update

apps/backend/app/base_modules/Tenant/controller/tenant_controller.ts

@@ -0,0 +1,13 @@
+import type { HttpContext } from '@adonisjs/core/http'
+
+export default class TenantController {
+  /**
+   * @summary Resolve current tenant context
+   * @responseBody 200 - {"tenant":{"id":42,"name":"Acme GmbH","slug":"acme-gmbh"}}
+   * @responseBody 400 - {"code":"E_TENANT_REQUIRED","message":"The X-Tenant-Id header is required."}
+   * @responseBody 403 - {"code":"E_TENANT_ACCESS_DENIED","message":"You do not have access to this tenant."}
+   */
+  async current({ response, tenant }: HttpContext) {
+    return response.ok({ tenant })
+  }
+}

apps/backend/app/base_modules/Tenant/model/tenant.ts

@@ -0,0 +1,31 @@
+import { BaseModel, column, manyToMany } from '@adonisjs/lucid/orm'
+import type { ManyToMany } from '@adonisjs/lucid/types/relations'
+import { DateTime } from 'luxon'
+import Admin from '#base_modules/Admin/model/admin'
+
+export default class Tenant extends BaseModel {
+  @column({ isPrimary: true, columnName: 'id' })
+  declare id: number
+
+  @column({ columnName: 'name' })
+  declare name: string
+
+  @column({ columnName: 'slug' })
+  declare slug: string
+
+  @column({ columnName: 'status' })
+  declare status: 'active' | 'inactive'
+
+  @column.dateTime({ autoCreate: true, columnName: 'created_at' })
+  declare createdAt: DateTime
+
+  @column.dateTime({ autoCreate: true, autoUpdate: true, columnName: 'updated_at' })
+  declare updatedAt: DateTime | null
+
+  @manyToMany(() => Admin, {
+    pivotTable: 'admin_tenants',
+    pivotForeignKey: 'tenant_id',
+    pivotRelatedForeignKey: 'admin_id',
+  })
+  declare admins: ManyToMany<typeof Admin>
+}

apps/backend/app/base_modules/Tenant/routes.ts

@@ -0,0 +1,8 @@
+import router from '@adonisjs/core/services/router'
+import { middleware } from '#start/kernel'
+
+const TenantController = () => import('#base_modules/Tenant/controller/tenant_controller')
+
+router
+  .get('/tenants/current', [TenantController, 'current'])
+  .use([middleware.auth(), middleware.tenant()])

apps/backend/app/base_modules/Tenant/services/tenant_access_service.ts

@@ -0,0 +1,15 @@
+import Tenant from '#base_modules/Tenant/model/tenant'
+
+export type ResolvedTenant = { id: number; name: string; slug: string }
+
+export default class TenantAccessService {
+  async resolveForAdmin(adminId: number, tenantId: number): Promise<ResolvedTenant | null> {
+    const tenant = await Tenant.query()
+      .where('id', tenantId)
+      .where('status', 'active')
+      .whereHas('admins', (admins) => admins.where('admins.id', adminId))
+      .first()
+
+    return tenant ? { id: tenant.id, name: tenant.name, slug: tenant.slug } : null
+  }
+}